Fix merging of private values (i.e. meta)
Now allows for a meta
key/value to be specified multiple times, with
the last value being the final value. In the example below, foo: "b"
will override foo: "a"
:
meta foo: "a"
meta foo: "b"
This allows disabling telemetry for a specific field that specifies a
resolver function, i.e.:
resolve &Foo.bar/3
meta absinthe_telemetry: false